Unable to open SharePoint Online document library in File Explorer

Introduction

SharePoint features a very useful function that enables users to open a document library as if it is a normal folder inside File Explorer. This would give the user access to normal file operations such as copy, move etc.

Look and feel of Open with Explorer in SharePoint 2013 in English

Look and feel of Öppna med Utforskaren in SharePoint 2010 in Swedish

Issue

When using Windows 7 and Internet Explorer 10 to open a document library the following error message appears and the library does not open in File Explorer:

We’re having a problem opening this location in File Explorer. Add this web site to your Trusted Sites list and try again.

A similar error message in Swedish:

Klienten har inte stöd för att öppna den här listan med Utforskaren.

Solution

At the moment this is a known issue with Internet Explorer 10 in Windows 7. The suggestion from Microsoft is to de-install IE10 and use an earlier version. Another option would be to upgrade to Windows 8.

Had a similar issue, and nothing I could find online was working. Eventually figured out that disabling Server Name Indication in the IIS bindings did the trick. Apparently the WebClient service doesn’t support that yet.